21 August 2009 Optical microcavities: single virus detection and nanoparticle trapping
Author Affiliations +
Proceedings Volume 7397, Biosensing II; 739702 (2009) https://doi.org/10.1117/12.827264
Event: SPIE NanoScience + Engineering, 2009, San Diego, California, United States
Single polystyrene nanoparticles are detected from resonance wavelength fluctuations in toroidal and spherical microcavities. The magnitude of the wavelength-shift signal follows a reactive mechanism with inverse dependence on mode volume. By reducing the size of a microsphere cavity we demonstrate sensitivity to single Influenza A virions. Furthermore, we introduce a novel mechanism for trapping and accumulation of nanoparticles at the microcavity-sensorregion by utilizing light-force exerted in evanescent field gradients.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Frank Vollmer, Frank Vollmer, Stephen Arnold, Stephen Arnold, } "Optical microcavities: single virus detection and nanoparticle trapping", Proc. SPIE 7397, Biosensing II, 739702 (21 August 2009); doi: 10.1117/12.827264; https://doi.org/10.1117/12.827264


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